Disclosure of Invention
The invention aims to provide a plate online weighing device, a plate online weighing method and a plate online weighing system with the plate online weighing device and the plate online weighing method, so as to solve the technical problem that the existing online or offline plate weighing efficiency is low.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
the application provides an online plate weighing device which comprises a second conveyor, a weighing module, an identification module and a controller, wherein the second conveyor is arranged on an executing part of the weighing module, and the identification module is used for identifying the area of a plate on the second conveyor; the on-line weighing device further comprises a first sensing module and a second sensing module which are used for sensing the plate material on the second conveyor, wherein the first sensing module and the second sensing module are respectively close to the feeding end and the discharging end of the second conveyor, and the identification interval of the identification module is arranged between the first sensing module and the second sensing module; the first sensing module senses that the sheet material sends a deceleration signal to the second conveyor through the controller, and the second sensing module senses that the sheet material sends a stop signal to the second conveyor through the controller.
Preferably, the second conveyor is a roller conveyor or a chain conveyor.
Preferably, the weighing module comprises a plurality of pressure sensors uniformly distributed at the bottom of the second conveyor.
Preferably, the identification module comprises a plurality of photoelectric switches arranged side by side parallel to the conveying direction of the second conveyor, and the light emitting parts of the photoelectric switches face the side wall of the plate material on the second conveyor.
The application also provides an online weighing method for the plate, which uses an online weighing device, and comprises the following steps: s2, conveying the piled plates by a second conveyor, and inputting the theoretical weight Ga of the unit area of the plates and the stacking quantity M of the plates to a controller; s4, the identification module identifies the area S of the plate on the second conveyor; s5, the weighing module dynamically weighs the plate on the second conveyor to obtain the weight w of the plate, the controller obtains data G1 according to a formula G1=w/S/M, and if the absolute value Ga-G1 exceeds a threshold value, the online weighing station and/or the batching station send out alarm information; s6, repeating the step S4a for N times, and obtaining data G1N by the controller according to a formula G1 n= (w1+w2+ … … wn)/N/S/M, and sending alarm information by the online weighing station and/or the batching station if the absolute value of Ga-G1N exceeds a threshold value.
Preferably, between step S2 and step S4, the steps are further included: s3, the first sensing module sends a deceleration signal to the second conveyor through the controller.
Preferably, after step S6, the method further comprises the step of: s7, the second sensing module sends a stop signal to the second conveyor through the controller; s8, the weighing module performs static weighing on the stacked plates to obtain the weight w of the plates, and data G2 is obtained according to a formula G2=w/S/M; if the absolute value of Ga-G2 exceeds the threshold value, the online weighing station and/or the batching station send out alarm information; if |G1-G2| exceeds the threshold, the on-line weigh station issues an alarm message.
The application also provides a system with the on-line plate weighing device, which comprises the on-line plate weighing device, a stacker, an unloader and an automatic packaging machine, wherein the stacker, the unloader, the second conveyor and the automatic packaging machine are sequentially arranged, and the plates are stacked by the stacker and then are transmitted to the second conveyor by the unloader.
The application further provides a system which comprises an unloader for moving the piled plates to the feeding end of the second conveyor, wherein the unloader comprises a first conveyor, a material supporting frame, a driver and material blocking frames, the first conveyor and the material supporting frames are arranged side by side and in a staggered mode, at least two of the first conveyor and the material supporting frames are arranged, the material blocking frames are vertically arranged on one side, close to the first conveyor, of the second conveyor, and the driver is used for driving the material supporting frames to move horizontally and vertically.
The application further provides a driver which comprises a servo sliding table and an air cylinder sliding table, wherein the output direction of the servo sliding table is vertically arranged, the output direction of the air cylinder sliding table is horizontally arranged and is perpendicular to the transmission direction of the second conveyor, the air cylinder sliding table is arranged at an executing part of the servo sliding table, and a material supporting frame is arranged at the executing part of the air cylinder sliding table.
Compared with the prior art, the application has the following beneficial effects:
According to the application, the piled plates are transmitted through the second conveyor, the weighing module weighs the plates, the identification module identifies the area of the plates, the weight of the unit area of the piled plates can be obtained by dividing the weight of the piled plates by the area and the number of layers of piled plates, and the online weighing efficiency is improved by several times.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and 2, the present application provides:
The on-line plate weighing device comprises a second conveyor 2, a weighing module 3, an identification module 4 and a controller, wherein the second conveyor 2 is arranged on an executing part of the weighing module 3, and the identification module 4 is used for identifying the area of a plate on the second conveyor 2; the on-line weighing device further comprises a first induction module 5 and a second induction module 6 for inducing the plate material on the second conveyor 2, wherein the first induction module 5 and the second induction module 6 are respectively close to the feeding end and the discharging end of the second conveyor 2, and an identification interval of the identification module 4 is arranged between the first induction module 5 and the second induction module 6; the first sensing module 5 senses that the sheet material transmits a deceleration signal to the second conveyor 2 through the controller, and the second sensing module 6 senses that the sheet material transmits a stop signal to the second conveyor 2 through the controller.
Based on the above embodiments, the technical problem to be solved by the present application is how to obtain the accurate weight per unit area of the sheet material online.
Therefore, the position of the plate on the second conveyor 2 is sensed by the first sensing module 5, and when the head end of the plate enters the identification zone of the identification module 4, the first sensing module 5 sends a deceleration signal to the second conveyor 2 through the industrial personal computer, so that the plate is accurately and dynamically weighed, and meanwhile, the recognition error of the identification module 4 is difficult to be caused by the plate passing slowly. According to the application, the position of the plate on the second conveyor 2 is sensed by the second sensing module 6, when the head end and the tail end of the plate are both positioned in the identification zone of the identification module 4, the second sensing module 6 sends a stop signal to the second conveyor 2 through the industrial personal computer, so that the plate is accurately and statically weighed, and meanwhile, the plate stopped moving cannot cause the identification error of the identification module 4.
After the weighing module 3 obtains the weight of the second conveyor 2 and the plate material, the weight of the plate material can be obtained by subtracting the weight of the second conveyor 2, and then the unit area weight of the plate material can be obtained by dividing the weight of the plate material by the area of the plate material obtained by the identification module 4.
In this embodiment, the controller means HMI and PLC, and a worker can set the length L, width W, stacking number M, number N of stacks and theoretical weight Ga per unit area of the sheet through HMI.
Further:
The second conveyor 2 is a roller conveyor or a chain conveyor.
Based on the above embodiments, the technical problem to be solved by the present application is that the existing weighing and conveying device does not have the property of weighing heavier materials, such as a belt scale, which cannot bear the weight of the stacked multi-layer gypsum boards.
Further:
the weighing module 3 comprises a number of pressure sensors evenly distributed at the bottom of the second conveyor 2.
Based on the above embodiments, the technical problem the present application intends to solve is how to accurately measure the weight of the second conveyor 2 so as to indirectly obtain the weight of the gypsum board. Therefore, the weight of each part of the second conveyor 2 is measured through a plurality of pressure sensors, and the industrial personal computer calculates, corrects and calculates the transmitted data of each pressure sensor to obtain the accurate weight of the second conveyor 2.
The weighing module 3 also comprises an instrument communicated with the PLC, and the numerical value of the pressure sensor can be displayed in real time through the instrument.
Further:
the identification module 4 comprises a plurality of photoelectric switches arranged side by side parallel to the conveying direction of the second conveyor 2, the light emitting parts of the photoelectric switches facing the side walls of the sheet material on the second conveyor 2.
Based on the above embodiments, the technical problem to be solved by the present application is how to identify the area of the sheet material. In this embodiment, the board is a gypsum board, and the width W thereof is constant, so that the length L thereof is only required to be identified by a plurality of photoelectric switches, wherein the interval between each photoelectric switch is about 0.5m, and 0m, 1.2 m, 1.7 m, 2.1 m, and 2.7 m are sequentially from left to right. If the side wall of the plate shields two photoelectric switches, the length of the plate is between 1.2 meters and 1.7 meters, and if the side wall of the plate shields four photoelectric switches, the length of the plate is between 2.1 meters and 2.7 meters, and because the specification of the gypsum board is limited, the accurate length L of the gypsum board can be obtained by checking a table only by knowing the length range of the gypsum board, and the area S of the plate can be obtained by multiplying the length L by the width W.
Of course, if the cost is not counted, the gypsum board can be photographed by a CCD camera, and the length L and the width W of the gypsum board can be obtained through image analysis.
Or a photoelectric switch can be used for sensing the head and tail passing of the plate, the time required for the plate to pass through the photoelectric switch is calculated through a timer, and then the time and the transmission speed of the second conveyor 2 are combined, so that the length L of the plate can be obtained.
As shown in fig. 3-5:
the system with the on-line plate weighing device comprises an on-line plate weighing device, a stacker, an unloader 1 and an automatic packaging machine, wherein the stacker, the unloader 1, a second conveyor 2 and the automatic packaging machine are sequentially arranged, and the plate is stacked by the stacker and then is transmitted to the second conveyor 2 through the unloader 1.
In this embodiment, the stacking of the whole plate is completed by the stacker crane, the plate is transported to the unloading station on line, the unloading machine 1 moves the plate to the on-line weighing device, the second conveyor 2 starts to transport on line, the plate is weighed by the weighing module 3 through the weighing station, and is packaged and delivered through the automatic packaging machine, and a forklift station and a bagging station are further arranged between the weighing station and the packaging station.
The system further comprises an unloader 1 for moving the piled plates to the feeding end of the second conveyor 2, the unloader 1 comprises a first conveyor 1a, a material supporting frame 1b, a driver 1c and a material blocking frame 1d, the first conveyor 1a and the material supporting frame 1b are arranged side by side and in a staggered mode, at least two of the first conveyor 1a and the material supporting frame 1b are arranged, the material blocking frame 1d is vertically arranged on one side, close to the first conveyor 1a, of the second conveyor 2, and the driver 1c is used for driving the material supporting frame 1b to move horizontally and vertically.
The present application uses a thin belt conveyor as the first conveyor 1a, and uses a flat and elongated steel plate as the stock carrier 1b and the stock stop 1d. In the present embodiment, the first conveyor 1a has three and is disposed alternately with two holding frames 1b, and the first conveyor 1a may have only two and be sandwiched between both sides of one holding frame 1b, or the holding frame 1b may have two and be sandwiched between both sides of one first conveyor 1 a.
Based on the above embodiment, the technical problem to be solved by the application is how to improve the efficiency of weighing the weight of the plate material per unit area on line. For this reason, the stacked multi-layer board is moved onto the second conveyor 2 by the unloader 1, in the process of moving, the first conveyor 1a transmits the gypsum board to the position right above the material supporting frame 1b, the driver 1c drives the material supporting frame 1b to move from the lower part of the first conveyor 1a to the upper part of the second conveyor 2 through the upper part of the material blocking frame 1d, at the moment, the gypsum board is lifted above the second conveyor 2 by the material supporting frame 1b, then the driver 1c drives the material supporting frame 1b to horizontally move away from the second conveyor 2 and then descend for resetting, and the gypsum board on the material supporting frame 1b is blocked by the material blocking frame 1d and then stays on an executing part of the second conveyor 2.
And then the second conveyor 2 transmits the stacked plates, and the weight of the unit area of the stacked plates can be obtained by dividing the weight of the stacked plates by the area and the stacking layers, so that the stacked multi-layer plates are weighed on line once, and the on-line weighing efficiency is improved by a plurality of times.
Further:
The driver 1c comprises a servo sliding table 1c1 and a cylinder sliding table 1c2, the output direction of the servo sliding table 1c1 is vertically arranged, the output direction of the cylinder sliding table 1c2 is horizontally arranged and perpendicular to the transmission direction of the second conveyor 2, the cylinder sliding table 1c2 is installed on an executing part of the servo sliding table 1c1, and the material supporting frame 1b is installed on an executing part of the cylinder sliding table 1c 2.
Based on the above embodiment, the technical problem to be solved by the present application is how the driver 1c drives the material supporting frame 1b to make a complex feeding motion, wherein the power source of the servo sliding table 1c1 is a servo motor, which can drive the cylinder sliding table 1c2 to lift by a precise distance, so that the unloader 1 can move the whole stack of boards onto the second conveyor 2 at a time, and the unloader 1 can stack a plurality of boards onto the second conveyor 2 in several times. The moving distance of the cylinder slide table 1c2 driving the pallet 1b does not need to be set precisely.
As shown in fig. 6:
An online weighing method for a sheet material, which uses an online weighing device, comprises the following steps:
s1, a stacker stacks gypsum boards, meanwhile, the stacking quantity M is output to an industrial control machine, and an unloader 1 transmits the stacked gypsum boards to a second conveyor 2;
s2, conveying the piled plates by the second conveyor 2, and inputting the theoretical weight Ga of the unit area of the plates and the stacking quantity M of the plates to a controller;
And S3, the first sensing module 5 sends a deceleration signal to the second conveyor 2 through the controller.
S4, the identification module 4 identifies the area S of the plate on the second conveyor 2;
S5, the weighing module 3 dynamically weighs the plate on the second conveyor 2 to obtain the weight w of the plate, the controller obtains data G1 according to a formula G1=w/S/M, and if the absolute value Ga-G1 exceeds a threshold value, the online weighing station and/or the batching station send out alarm information;
S6, repeating the step S4a for N times, and obtaining data G1N by the controller according to a formula G1 n= (w1+w2+ … … wn)/N/S/M, and sending alarm information by the online weighing station and/or the batching station if the absolute value of Ga-G1N exceeds a threshold value.
S7, the second sensing module 6 sends a stop signal to the second conveyor 2 through the controller;
S8, the weighing module 3 carries out static weighing on the piled plates to obtain the weight w of the plates, and data G2 are obtained according to a formula G2=w/S/M; if the absolute value of Ga-G2 exceeds the threshold value, the online weighing station and/or the batching station send out alarm information; if |G1-G2| exceeds the threshold, the on-line weigh station issues an alarm message.
In the embodiment, the alarm is given when the absolute value of Ga-G1 is more than or equal to 0.12Kg/m 2 or the absolute value of Ga-G1n is more than or equal to 0.1Kg/m 2, and the alarm is given when the absolute value of Ga-G2 is more than or equal to 0.1Kg/m 2 or the absolute value of G1-G2 is more than or equal to 0.1Kg/m 2. The conveying speed of the second conveyor 2 after deceleration is 8m/min.
In the case of no alarm, the difference between G1 or G2 and Ga is recorded in the touch screen HMI and made into a trend graph to form a traceable data record.
The specific implementation steps of the PLC are as follows:
step one, initializing;
Step two, receiving each detection signal;
step three, detecting data is fed back to the PLC input module and setting is carried out;
Step four, the central processing unit carries out logic operation on the received data according to the HMI setting parameters and the setting program to obtain the unit weight of the finished board and the difference value between the unit weight and the set theoretical value;
Fifthly, outputting and displaying data such as the average unit weight and the difference value between the average unit weight and the theoretical set value to the HMI;
And step six, outputting an alarm or adjusting parameters according to judgment.
The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this application will occur to those skilled in the art, and are intended to be within the spirit and scope of the application.